Method of forming closures



Nov. 6, 1928.

1,690,523 w. M. BELL IETHOD OF FORMING CLOSURES Filed Sept. 26, 1927 3 Sheets-Sheet 2 Wwiazmngew amm .wMw-s- Nov. 6, 1928. 1,690,523

w. M. BELL METHOD OF' FORMING CLOSURES Filed sept. 26, 1927 s sheets-sheet 3 -Willanvell/ 3mm Patented Nov. 6, 1928. A

UNITED STATES enamorarse- WILLIAM u. BeLaor PORTSMOUTH, offro.

Application filed September 28, 1827. Serial Nen-222,157.

This' invention relatesfto a bung Aor sput for -use injconneetion with steel drums, bar rels or the like metal containers that require an opening for filling and removing the con- The primaryobje'ct of the -invention 'is' to provide 'a closure or'sput and a simple and eflcient method of constructin the closure or'sput, the method bein 'suc that when lo carried out insures a Hui -tight connection between the closure and barrel in which the closure or-spnt is positione A Another important object of the invention 1 is the rovision of a sput which willv permit vof per ect drainage of the container and one which will not turn with respect to the c on'- 4tainer should it be found necessary to apply excessive force to the'fplug fitted in the closure or sput to remove -the same` the rovisionof a sput' wherein the plug used to 'c 'ose the sput will seat-against the metal Vof which'the body prtion of the-device is constructed.

With the foregoingandother objects in' view which will appear as the description' proceeds, the invention resides in the combination' and arrangement of, p arts and in the details of construction hereinafter described and claimed, it being understoodthat chan es in the precise embodimexit of the invention herein disclosed, may be made Within the scope of what is claimed, without departing -4 from the spirit ofthe invention.' Referring t'o the drawings?. Figure 1 isa vertical sectional view through dies in the act offorming a 4Sput.

Figure 2 is a vertica'l'sectional view through cooperating dies 'showing a step inthe forming of the sput` Figure 3 is a vertical sectional view throu h vcooperating. diesemployed in 'completing e s'put.

-Figure4- is asectional view through a sput formed by the various steps described.

Figure 5-is a' vertical sectional view illustra'ting the manner of punching the sput -`opening in the body of vthe container. Figure 6 is avertical sectional view through- 503 coacting die members employed in positionin gthespu't.'- 'Figure 7 is a'vertical sectional view showing a further-step in the positioning of the` sput in the c ontainer.-Y

A still further object of the invention is fnishedfspug an as sho Figure-8 is a vertical sectional .viewthrough v coacting dies illustratingia still further step in the positioning of the s ut. f

Figure 9 is a vertical sectional view throxigh:

coacting dies illustrating in the positioning of asp'ut.

Figure 10 is a 'vertical sectional view through a further modified form of'sput.

thecompleting step` ,Figuge L1 is a Avertical sectional view l through a further modified form of s ut;

Figure 12 is another modified form 0 'sput.

Figure 13 a form of sputa Figure 14 is a fragmental sectional` view xthrougha container showingthe preferred form of sput as positioned'.

Referring to thedrawingsin detail, the

reference character ilesignates the stationplan 'view ef the preferred ary die andthe reference character 6 in'di-A catesthe movable die 'employed in' the construction of asput.

length of suitable sheet ,metal'of which the sput is formedvwhich is .positioned o'n the stationary die 5 in a mannefrlas Fi ure 1 of the drawings, the dies being provicied with suitable cooperating extensions 8 and 9` respectively that move into openings or grooves 1n the die faces of opposed dies t0 bend and Aform the sput.

Spring pressed plungers 10 :and 11 form a part-0f the 'stationar die, which'plungers move downwardly un er the action of the movable die 6. The movable' diefis also provided with -a spring pressed plunger 12 that acts to removevthe disk 13. which 'is cut from the blankbythe movable die after the' mov- .shown by i ble diehas been returned to Aits inoperative A or uppermbs't-position.

'with :xn-annular groove formed'wit curved walls conform' to'the curvatures of the sput as formed by the dies shown by Fgl11021 is inverted and placed inthe die 1 5 ma U18-l1* of the ontainar, which formed in a' 'unfinished-- wn,the 0 The r'eference character 7 indicates a' metal o v connection between the manner to be hereinafter more fully described.

rl`he invention also embodies dies such as indicated at 17 and 18, the die 18 being provided with a cylindrical unching extremity 19 formed with a centraFopening to accommodate the extension 20 of the stationary punching die 17. Spring pressed plungers 21 are provided in the stationary die and move downwardlgy as the punching extremity 19 of the die 18 moves downwardly' thereagainst. A spring pressed plunger 22 is provided in the die 18 for ejecting the portions 23 of the metallic container.

In the use .of the punching die, the stationary section 17 thereof is positioned under the head or within the body of the container to which the sput is to be applied, and the movable die 18 .is forced against the head or body portion of the container, which punches the opening in the head or container 4and at the same time bends portions of the head. or container dcwnwardl to define a Hangs 24.

The finished sput w ich is shown by Figure 4 of the drawings is now positioned in a stationary die 25 and the stationary die is positioned under the sput openin the flange 24 bein directed into the space etween the inwar y bent end of theosput and the body rtion thereof, whereupon the movable die 26 is brought into contact with the container' head or bod portion of the container adjacent to the ange, pressure being applied to lforce the flange 24 within the space as shown by Figures 7 and 8.

The dies 25 and 26 are now removed and the coacting dies 27 and 28 res ectively are brought into play adjacent to t e sput with the result that the container head or container bod is bent as at 29 so that the inner surface of t e s ut alines with the inner 'surface of the hea or container, allowing the entire contents of the container to be drained' therefrom, and eliminating the usual shoulder and flange adjacent to the sput that prevent complete drainage of the contents. i

A modifie form of sput is shown by Fi re 10 in which the head -or body of a container is shown as bent in a manner to secure the sput. position, the metal of the container forming a protector for the sput.

The sput in this form extends above the the containeras indicated at 30 where the sput is "formed with external threads 'rece've the cap 31 which may be screwed in posi ion to `close the sput opening. As shown by Figure'll, the sput 32 iS formed with ,internal threads to receive the threads of the plug 33, there'bcingprovided a. gasket 34 for further-,insuring a uid-tight ut and plug or closure.k It might-be furt er state that a sealer tab such as indicated atlll may be positioned adjaeent'to the, spnt durmg the operation sf-positioning the sput in the oon- .shortange de incassa tainer, so that a sealing wire may be employed in connection with the closure, or plug 33.

The form of sput as shown by Figure 11 may be also positioned in Va manner as shown by Figure 12, that is to say after the sput has been positioned, a suitable die may be employed for pressing that portion of the con tainer oi' head in which the sput is positioned, outwardly as at 36 or to a point in a line with the outer edge of the sput.

When this form of the invention is employed, the plug which is indicated by the numeral 37 is provided with a substantially wide flange 38 which is of a width to close the space 39 that is formed during the bending operation.

The preferred form of sput however, is indicated by Figures 13 and 14, and it will be seen that this form of the invention is similar to that shown by.Figure 10, except the sput 40 is provided with internal threads to accommodate the plug 41 which is also provided with a flange 42 that bears against the gasket 43 when the plug is properly positioned. y

From the foregoing iti will be obvious that due to the construction own and described, thesput will be securely ocked bythe method carried out and will revent twisting of the sput withrespect to t e head or container in which the sput is ositioned should excessive pressure beexcrte on the plug in an effort to remove the plu frbm the sput.

It will also e een that due to this construction, the enti contents of a container or drum may be removed or drained therefrom, and that the plug used in connection with the sput will seat against the basic metal of which the container is formed, thereby insuring a Huid-tight connection.

I claim: y

1. A method of forming a closure for sheet metal containers consisting in providing a ring member from a length of sheet metal, and simultaneously bending the circular member to define a short flange and a long ilan v bend' the lon liange inwardly towards t e tigning a flange receiving space finally resenting a curved inner su short ace 8.11 threading the inner surface of the 2.gA method of forming a closure for sheet metal containers consisting in pressing a length of sheet metal between coacting dies to punch a circular body portion from the leng ofsheet metal, placing the circular body K nthe flanges downwardly and inwardly, to define a double circular space.

3. A `method of forming a closure for sheet metal containers co -in l c a length of sheet inetal between,

.tion between cooperating dies to Provi e a .,fw

aced flanges of un.

and operating the dies to punch a ring member from the length of sheet metal, bending the ring member to define spaced flanges, placing the ring member in a die with the flanges extended upwardly moving a die into engagement with one of the flanges to bend the same downwardly and inwardly to provide a curved double space to receive the flange of a bun opening, and finally threading the inner sur ace of one of the flanges.

4. A method of forming a closure for sheet metal containers consisting in punching a body portion from a length of sheet metal and simultaneously bending the body portion t0 define spaced flanges, bending one of the flanges along a curved line towards the other yflange and providing a .space to receive the 5. A method of forming a closure for sheet metal containers consisting in providing a rin member from a length of sheet metal an bending the ring member to define flanges, said flanges being in spaced relation with each other, bending one of the flanges inwardly and downwardly towards the other flange to provide a space between the flange and main portion of the ring member to receive the flange of a sput opening, and finally threading the inner surface of one of the flanges.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature.

WILLIAM M. BELL. 

